During yesterday’s Next Big Thing Panel at San Diego Comic-Con, Marvel Entertainment unveiled that it is joining forces with comiXology, for a line of exclusive digital comics. Available free to comiXology Unlimited subscribers and only available through comiXology and Kindle these comics will be part of the comiXology Originals line of exclusive digital content.

Marvel and comiXology’s team-up kicks off with Immortal Iron Fists, a 6-issue bi-weekly series written by Kaare Andrews with art by Afu Chan. Immortal Iron Fists is on sale today for $2.99 on comiXology and Kindle or free to comiXology Unlimited subscribers as part of their subscription. New users to comiXology’s popular subscription service can also access the book for free as part of their 30-day free trial. Additional exclusive series will be announced soon.

A unique entry-point that’s perfect for new fans and longtime readers alike, Immortal Iron Fists tells the tale of Pei, a young female monk from K’un-Lun and the youngest person to ever bear the mark of the Iron Fist. While Pei tackles the trials of high school, Danny Rand, the Immortal Iron Fist, faces his greatest challenge yet: training the inexperienced Pei. All the while, a growing threat appears that will take more than one pair of Iron Fists to defeat!